Quincy Compressor 50093-103 - Manual (Page 43)

37
Pressure relief valves are sized to protect the system.
Never change the pressure setting or tamper with the
valve. Only the relief valve manufacturer or an approved
representative is qualified to make such a change.
Relief valves are to be placed ahead of any potential
blockage point that includes, but is not limited to, such
components as shut-off valves, heat exchangers, and
discharge silencers. Ideally, the relief valve should be
threaded directly into the pressure point it is sensing, not
connected with tubing or pipe, and pointed away from any
personnel. Always direct discharge from relief valves to a
safe area away from personnel.
Electrical
Before installation, the electrical supply should be
checked for adequate wire size and transformer capacity.
During installation, a suitable fused or circuit breaker
disconnect switch should be provided. Where a 3-phase
motor is used to drive a vacuum pump, any unreasonable
voltage unbalance between the legs must be eliminated
and any low voltage corrected to prevent excessive
current draw.
Connect incoming 3-phase power to the power block
supplied inside the electrical enclosure and tighten to the
torque specified on the side of the power block. The
installation, electric motor, wiring and all electrical controls
must be in accordance with NFPA 70-1992 National
Electric Code, and all state and local codes. All electrical
work should be performed by a qualified electrician. This
unit must be grounded in accordance with applicable
codes. See control panel for the proper wiring diagram.
! WARNING !
High voltage may cause severe personal injury
or death. Disconnect all power supplies before
opening the electrical enclosure for servicing.
! CAUTION !
NEMA electrical enclosures and components
must be appropriate to the area in which they are
installed.
Guards
All mechanical action or motion is hazardous in varying
degrees and needs to be guarded. Guarding shall comply
with OSHA Safety and Health Standards 29 CFR 1910.219
and any state or local codes.
! WARNING !
Cabinet panels and drive guards must be
fastened in place before starting the machine
and never removed before tag and lock out of the
main power supply.
Water Piping
Water piping must be of adequate size to flow the required
amount of coolant at minimum coolant head conditions,
maximum coolant temperature and maximum operating
horsepower conditions. Failure to adequately cool can
result in short life, restrictions in filter elements, reduced
heat transfer and fires.